.travis.yml in lightio-0.1.0.pre vs .travis.yml in lightio-0.1.0

@@ -1,5 +1,18 @@
 sudo: false
 language: ruby
 rvm:
+  - jruby-9.1.15.0 # latest stable
+  - 2.2.7
+  - 2.3.4
   - 2.4.1
-before_install: gem install bundler -v 1.16.0
+  - ruby-head
+
+env:
+  global:
+    - JRUBY_OPTS="--dev -J-Djruby.launch.inproc=true -J-Xmx1024M"
+
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby-9.1.15.0
+  fast_finish: true